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块 组 合 : 31 phrases in 10 subjects |
| Agriculture | 1 |
| Automobiles | 5 |
| Aviation | 1 |
| Electronics | 3 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Information technology | 2 |
| Metallurgy | 2 |
| Technology | 14 |
| Textile industry | 1 |
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